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SubjectRe: [PATCH 2/2] um: Disable CONFIG_CMPXCHG_LOCAL
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On Wed, Apr 13, 2011 at 3:41 PM, Richard Weinberger <richard@nod.at> wrote:
> Commit 8a5ec0ba "Lockless (and preemptless) fastpaths for slub"
> makes use of this_cpu_cmpxchg_double() which needs
> this_cpu_cmpxchg16b_emu() on x86_64.
> Implementing cmpxchg16b emulation for UML would introduce
> too much complexity. So just disable it.
>
> LKML-Reference: <20110412192014.GF16342@mtj.dyndns.org>
> Reported-by: Sergei Trofimovich <slyich@gmail.com>
> Signed-off-by: Richard Weinberger <richard@nod.at>

Acked-by: Pekka Enberg <penberg@kernel.org>


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